I worked a convenience store near a campground in Alberta, Canada.
This one American lady argued with me for almost twenty minutes over the fact that we didn't accept American currency.
I finally "gave in" so as to not hold up an ever increasing line... took her money and gave her change at par.
This so infuriated her that she sat there for like another half hour bitching about it. I told her if she wanted US change, she needed to go back to the US. Otherwise, she needed to take her dumb ass to an exchange bank.
In what universe is a convenience store a bank lady? If I travel to another country I don't expect them to accept my currency... what fucking gives?